Quartz (Var. Amethyst)

"SiO2

Serra do Mar, Rio Grande do Sul, Brazil

Like the quartz crystal behind you, these amethyst crystals have size sides that come to a point. Amethyst is the purple variety of quartz. Once part of a 32,000-kg (70,000-lb) geode, this specimen comes from Brazil's famous amethyst mines.

(75814)"

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